Just in case someone would take a look in this post to see if 2.07 Hyperwap works over 2.08 linksys: The answer is yes for me.
Just had to do the disable-downgrade trick and it's working. Only the Diag-LED Bug is there, which is not affecting any speed issues

I did not see a improvement in Wlan power in % between 42 and 84 mW Sending power. Signal strength is now about 70 instead of 50%. But I can see a speed improvement when transmitting to my xbox (from 1 Mbyte to 1.5 Mbyte)